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Expired European patentEurope

Double tuned circuit for distrubuted lumped capacitance observe coils

EP 0336591 B1 · Applicant: VARIAN ASSOCIATES, INC.

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed March 17, 1989 and granted December 20, 1995. A European patent lasts at most 20 years from filing, so its term ended March 17, 2009.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by September 17, 2014.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledMarch 17, 1989
PublishedOctober 11, 1989
GrantedDecember 20, 1995
Term endedMarch 17, 2009
Application numberEP 89302658
Classification (CPC)G01R33/3635

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedMarch 17, 1989PublishedOct 11, 1989Patent grantedDec 20, 1995Term endedMarch 17, 2009

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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